/* Copyright (C) 2001-2021 Artifex Software, Inc.

   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or

   implied.

   This software is distributed under license and may not be copied,

   modified or distributed except as expressly authorized under the terms

   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact

   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,

   CA 94945, U.S.A., +1(415)492-9861, for further information.

*/

/* Adobe Type 1 encryption/decryption. */

#include "stdpre.h"

#include "gstypes.h"

#include "gscrypt1.h"

/* Encrypt a string. */

int

gs_type1_encrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)

{

    crypt_state state = *pstate;

    const byte *from = src;

    byte *to = dest;

    uint count = len;

    while (count) {

        encrypt_next(*from, state, *to);

        from++, to++, count--;

    }

    *pstate = state;

    return 0;

}

/* Decrypt a string. */

int

gs_type1_decrypt(byte * dest, const byte * src, uint len, crypt_state * pstate)

{

    crypt_state state = *pstate;

    const byte *from = src;

    byte *to = dest;

    uint count = len;

    while (count) {

        /* If from == to, we can't use the obvious */

        /*      decrypt_next(*from, state, *to);        */

        byte ch = *from++;

        decrypt_next(ch, state, *to);

        to++, count--;

    }

    *pstate = state;

    return 0;

}